<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <el-card>
      <!-- 添加角色按钮 -->
      <el-row>
        <el-col>
          <el-button type="primary" @click="addDialogVisibleRole=true">添加角色</el-button>
        </el-col>
      </el-row>

      <!-- 角色列表 -->
      <el-table :data="rolelist" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row
              v-for="(item1, i1) in scope.row.children"
              :key="item1.id"
              :class="['vcenter','bdbottom',i1 ===0 ?'bdtop':'']"
              @close="removeRightById(scope.row,item1.id)"
            >
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag closable>{{item1.authName}}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级三级权限 -->
              <el-col :span="19">
                <!-- 通过循环嵌套渲染二级权限 -->
                <el-row
                  v-for="(item2, i2) in item1.children"
                  :key="item2.id"
                  :class="['vcenter',i2 ===0 ?'':'bdtop']"
                  @close="removeRightById(scope.row,item2.id)"
                >
                  <!-- 二级权限 -->
                  <el-col :span="6">
                    <el-tag type="success" closable>{{item2.authName}}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <!-- 三级权限 -->
                  <el-col :span="18">
                    <el-tag
                      type="success"
                      closable
                      v-for="item3 in item2.children"
                      :key="item3.id"
                      @close="removeRightById(scope.row,item3.id)"
                    >{{item3.authName}}</el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <el-button
              type="primary"
              icon="el-icon-edit"
              size="mini"
              @click="showEditDialog(scope.row.id)"
            >编辑</el-button>
            <el-button
              type="danger"
              icon="el-icon-delete"
              size="mini"
              @click="removeRoleById(scope.row.id)"
            >删除</el-button>
            <el-button
              type="warning"
              icon="el-icon-setting"
              size="mini"
              @click="showSetRightDialog(scope.row)"
            >分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>

    <!-- 分配权限的对话框 -->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="50%"
      @close="setRightDialogClosed"
    >
      <!-- 树形控件 -->
      <el-tree
        ref="treeRef"
        :data="rightslist"
        :props="treeProps"
        show-checkbox
        node-key="id"
        default-expand-all
        :default-checked-keys="defKeys"
      ></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 添加角色 -->
    <el-dialog
      title="添加角色"
      :visible.sync="addDialogVisibleRole"
      width="50%"
      @close="addDialogClosed"
    >
      <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="80px">
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="addForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="addForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisibleRole = false">取 消</el-button>
        <el-button type="primary" @click="addRole">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 修改角色对话框 -->
    <el-dialog title="修改角色" :visible.sync="editDialogVisible" width="50%" @close="editDialogClosed">
      <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="80px">
        <el-form-item label="角色名称">
          <el-input v-model="editForm.roleName" disabled></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="editForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editRoleInfo">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data () {
    return {
      // 添加角色的表单数据
      addForm: {
        roleName: '',
        roleDesc: ''
      },
      // 查询到的角色信息对象
      editForm: {},
      // 添加表单的验证规则对象
      addFormRules: {
        // 验证角色名称
        roleName: [
          { required: true, message: '请输入角色名称', trigger: 'blur' },
          {
            min: 2,
            max: 10,
            message: '角色名称的长度在 2 到 10 个字符',
            trigger: 'blur'
          }
        ],
        // 验证角色描述
        roleDesc: [
          { required: true, message: '请输入角色描述', trigger: 'blur' },
          {
            min: 3,
            max: 10,
            message: '角色描述长度在 3 到 10 个字符',
            trigger: 'blur'
          }
        ]
      },
      // 修改角色表单的验证规则
      editFormRules: {
        // 验证角色描述
        roleDesc: [
          { required: true, message: '请输入角色描述', trigger: 'blur' },
          {
            min: 3,
            max: 10,
            message: '角色描述长度在 3 到 10 个字符',
            trigger: 'blur'
          }
        ]
      },
      // 添加角色对话框的显示与隐藏
      addDialogVisibleRole: false,
      // 控制修改用户对话框的显示与隐藏
      editDialogVisible: false,
      // 所有角色列表数据
      rolelist: [],
      // 控制分配权限对话框的显示与隐藏
      setRightDialogVisible: false,
      rightslist: [],
      // 树形控件的属性绑定对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      // 默认选中的节点id值数组
      defKeys: [105, 116],
      // 当前即将分配权限角色的id
      roleId: ''
    }
  },
  created () {
    this.getRolesList()
  },
  methods: {
    // 获取所有角色列表数据
    async getRolesList () {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$message.error('获取列表失败')
      }
      this.rolelist = res.data
    },

    // 根据id删除对应权限
    async removeRightById (role, rightId) {
      // 弹框提醒用户是否要删除
      const confirmResult = await this.$confirm(
        '此操作将永久删除该文件, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }
      ).catch(err => err)

      if (confirmResult !== 'confirm') {
        return this.$message.info('取消删除')
      }
      const { data: res } = await this.$http.delete(
        `roles/${role.id}/rights/${rightId}`
      )
      if (res.meta.status !== 200) {
        return this.$message.error('删除失败')
      }
      this.$message.success('删除成功')
      role.children = res.data
    },

    // 展示分配权限的对话框
    async showSetRightDialog (role) {
      this.roleId = role.id
      // 获取所有权限数据
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) {
        return this.$message.error('获取权限列表失败')
      }
      // 把获取的权限数据保存到rightslist中
      this.rightslist = res.data
      console.log('res.data :', res.data)
      // 递归获取三级节点的id
      this.getLeafKeys(role, this.defKeys)
      this.setRightDialogVisible = true
    },

    // 通过递归的形式，获取角色下所有三级权限的id并保存到defKeys数组中
    getLeafKeys (node, arr) {
      // 如果当前node 节点不包含children属性，则是三级节点
      if (!node.children) {
        return arr.push(node.id)
      }

      node.children.forEach(item => this.getLeafKeys(item, arr))
    },

    // 监听分配权限对话框的关闭事件
    setRightDialogClosed () {
      this.defKeys = []
    },
    // 点击为角色分配权限
    async allotRights () {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]

      const idStr = keys.join(',')

      const { data: res } = await this.$http.post(
        `roles/${this.roleId}/rights`,
        { rids: idStr }
      )
      if (res.meta.status !== 200) {
        return this.$message.error('分配权限失败')
      }

      this.$message.success('分配权限成功')
      this.getRolesList()
      this.setRightDialogVisible = false
    },

    // 点击确定添加新角色
    addRole () {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return
        // 可以发起添加用户的请求
        const { data: res } = await this.$http.post('roles', this.addForm)
        console.log(res.meta.status)
        if (res.meta.status !== 201) {
          this.$message.error('添加角色失败')
        }
        this.$message.success('添加角色成功')
        // 隐藏添加角色的对话框
        this.addDialogVisibleRole = false
        // 重新获取角色列表数据
        this.getRolesList()
      })
    },

    // 监听添加角色对话框的关闭事件
    addDialogClosed () {
      this.$refs.addFormRef.resetFields()
    },

    // 根据id删除对应的角色
    async removeRoleById (id) {
      // 询问是否确定删除
      const confirmResult = await this.$confirm(
        '此操作将永久删除该角色, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }
      ).catch(err => err)
      // 如果用户点击确定，则返回字符串confirm
      // 如果用户点击确定，则返回字符串cancel
      console.log(confirmResult)
      if (confirmResult !== 'confirm') {
        return this.$message.error('已取消删除')
      }
      const { data: res } = await this.$http.delete('roles/' + id)
      console.log('res :', res, 'res.meta.status:', res.meta.status)
      if (res.meta.status !== 200) {
        return this.$message.error('删除失败')
      }
      this.$message.success('删除成功')
      // 刷新数据列表
      this.getRolesList()
    },
    // 修改用户信息
    async showEditDialog (id) {
      this.editDialogVisible = true
      console.log('haha :', 'haha')
      const { data: res } = await this.$http.get('roles/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('查询用户信息失败')
      }
      this.editForm = res.data
      console.log('this.editForm :', this.editForm)
    },
    // 监听修改角色对话框的关闭事件
    editDialogClosed () {
      this.$refs.editFormRef.resetFields()
    },

    // 修改用户信息并提交
    editRoleInfo () {
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) return
        // 发起修改用户信息的数据请求
        const { data: res } = await this.$http.put(
          'roles/' + this.editForm.roleId,
          { roleName: this.editForm.roleName, roleDesc: this.editForm.roleDesc }
        )
        console.log('res.meta.status :', res.meta.status)
        console.log(
          this.$http.put('roles/' + this.editForm.roleId, {
            roleName: this.editForm.roleName,
            roleDesc: this.editForm.roleDesc
          })
        )
        if (res.meta.status !== 200) {
          return this.$message.error('更新用户信息失败')
        }
        // 关闭对话框
        this.editDialogVisible = false
        // 刷新数据列表
        this.getRolesList()
        // 提示操作成功
        this.$message.success('更新用户信息成功')
      })
    }
  }
}
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
}

.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}

.vcenter {
  display: flex;
  align-items: center;
}
</style>
